What is the PTP distance requirement for 480V in an EHV yard?

The PTP (Proximity to Power) distance requirement for 480V in an EHV (Extra High Voltage) yard is grounded in safety practices that aim to minimize the risk of electrical shock and ensure the safety of personnel working near high-voltage equipment. The specified distance of 1 foot 1 inch represents the minimum safe working distance that should be maintained around 480V equipment to avoid electrical hazards.

This standard takes into account factors such as the potential for electrical arcs and the need for workers to have enough distance to safely maneuver and operate tools without the risk of accidental contact with energized components. Adhering to these requirements is crucial for maintaining a safe working environment, particularly in settings where high voltages are present.

The other distances provided do not align with the set standards for 480V in EHV yards, as they exceed the minimum requirement, which is specifically tailored for the voltage level mentioned. Thus, the correct answer reflects the established safety protocols designed to protect workers in the field.